THE DESIGN AND CONSTRUCTION OF A HOT PRINTING MACHINE
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Parameters on which clear prints depends were comprehensively investigated. The study revealed that clear print depends on the impressed pressure, the working temperature and the silver print paper. Also studied were the manners of dependence of these parameters on prints impressed on sheets of varied thickness. The result of this investigations were utilized in the design and construction of a operational hot (manual) printing machine.
TABLE OF CONTENT CHAPTER ONE1.0 introduction
1.1 Identification of need
1.2 Purpose of the project
CHAPTER TWO2.1 Literature review
CHAPTER THREE3.0 Specification of components
3.2 Choice of material and methods
3.3 Component parts
CHAPTER FOUR4.0 theory of design/design calculations
4.1 Heating system
4.2 Mechanical system
CHAPTER FIVE5.0 sequence of operation
CHAPTER SIX6.0 machine handling
6.2 Operation procedure
CHAPTER SEVEN7.0 testing
7.1 Experimental determination of temperature time relationship
7.3 Mechanical efficiency
CHAPTER EIGHT8.0 Cost estimate
8.1 material cost analysis
8.2 Machine/labour cost analysis
8.2 Summary of analysis
References CHAPTER ONEINTRODUCTION
1.1 IDENTIFICATION OF NEED
In recent years Nigeria lays strong emphasis on mass literacy and indigenous technology. Printed matters are indispensable material in mass literacy campaign. The trend towards indigenous technology imposes a severe clamp down on imported engineering including printing machinery. Thus, the situation is such that makes the acquisition of printing machinery from outside our own borders extremely difficult.
To lessen the economic strain on the mass literacy campaign, the production of local printing machinery I s apparently imperative. It is this fact that rendered initiative to the conception and realization of this low cost but efficient printing machine based entirely on local technology and resources.
This machine is very useful in the printing of many items like paperbacks, cards, leatherbacks etc. Its design is expected to motivate and advance the design and construction of other machines destined for similar purposes and based on indigenous technology and resources.
1.2 PURPOSE OF THE PROJECT
Civilization and complexity of modern society has brought a number of social problems to be traced.
The use of textbooks, printed materials such as success cards and posters has now become imperative for the overall dissemination of heart felt feelings and messages to friends both near and far.
Unfortunately, the prevailing economic pr oblem in the country (Nigeria) have sky rocketed the prices of these items. Renders for example now rely solely on the libraries for up dating their knowledge.
It becomes clear then, the need to equip the libraries to met up with the challenges of their services.
Apart from refurbishing damaged books libraries are expected to render services such as printing of cards, printing and binding of students write ups like thesis, project etc.
All this needs formed the basis for the construction of this machine because these functions cannot be performed without a printing machine.
TYPES – These are the characters or alphabets
that form the letters
PRINT – This is the mark or impression produced
on pa per due to the types
DEPOSITS – This is a thin rectangular
cellophane sheet coated with silver compounds.